/*
 *  Simbad - Robot Simulator
 *  Copyright (C) 2004 Louis Hugues
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 -----------------------------------------------------------------------------
 * $Author: sioulseuguh $ 
 * $Date: 2005/04/25 17:54:59 $
 * $Revision: 1.2 $
 * $Source: /cvsroot/simbad/src/simbad/sim/StaticObject.java,v $
 */

package simbad.sim;

import javax.media.j3d.Appearance;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Bounds;
import javax.media.j3d.Transform3D;

/**
 * Base Object for all block world objects (box,wall,arch ...). All object which
 * doesnt move.
 */
public class StaticObject extends BaseObject {
	/** Transformed bounds is the bound object in global coordinates. */
	protected Bounds transformedBounds;
	/** The local to global transform. */
	protected Transform3D localToVworld;

	/** Appearance of the object. */
	protected Appearance appearance;

	/** Create object's geometry. */
	protected void create3D() {
		super.create3D(false);
		appearance = new Appearance();
		compilable = true;
		localToVworld = new Transform3D();
	}

	/**
	 * Create and pre Compute the transformed bound of the objects. Needs
	 * localtoVWorld.
	 */
	protected void createTransformedBounds() {

		transformedBounds = (Bounds) (localBounds.clone());
		transformedBounds.transform(localBounds, localToVworld);

	}

	/** Gets the bound of the object taking account of its current position. */
	protected Bounds getTransformedBounds() {
		return transformedBounds;
	}

	/** Create the definitive local to global transform . */
	protected void createLocalToVworld() {
		group.getLocalToVworld(localToVworld);
	}

	/**
	 * Returns true if the object intersect with the given bounding sphere. This
	 * can be overriden.
	 * 
	 * @param bs
	 *            the boundingsphere to intersect with.
	 */
	protected boolean intersect(BoundingSphere bs) {
		return transformedBounds.intersect(bs);
	}
}
